Abstract
Aqueous suspensions of submicron charge-stabilized colloid possess qualities which render them uniquely valuable as model systems for investigating the microscopic aspects of phase transitions in two and three dimensions. Amenable both to direct microscopic observation and also to macroscopic probes such as light diffraction, charged colloid can be manipulated or simply left alone and its progress charted as a model for a wide class of condensed matter systems. In a real sense, these suspensions act as analog molecular dynamics simulation test-beds. We discuss results of time-resolved video microscopy studies of the statics and dynamics of two- and three-dimensional suspensions of submicron polystyrene spheres. Highlights include evidence for continuous two-stage melting in two-dimensions with a hexatic fluid intervening between crystalline and isotropic fluid phases, comparison of this to apparently first-order melting of a three-dimensional crystalline layer into a dense layered fluid, and the dynamics of both types of suspensions near melting. We close with a brief overview of work in progress on kinetic phenomena and on applications to problems in other systems.
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Grier, D.G., Murray, C.A. (1992). Video Microscopy of Charge-Stabilized Colloidal Suspensions. In: Chen, SH., Huang, J.S., Tartaglia, P. (eds) Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution. NATO ASI Series, vol 369. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2540-6_6
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DOI: https://doi.org/10.1007/978-94-011-2540-6_6
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